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Phase Stability of Sigma + Beta Microstructures in the Ternary Nb-Ti-Al System

Published online by Cambridge University Press:  21 February 2011

D. T. Hoelzer  and
F. Ebrahimi
D. T. Hoelzer
Affiliation:
Dept. of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
F. Ebrahimi
Affiliation:
Dept. of Materials Science and Engineering, University of Florida, Gainesville, FL 32611
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Abstract

An alloy with the nominal composition 42Nb-28Ti-30Al (at.%) was heat treated in the sigma + beta phase region. The evolution of σ phase from the metastable β phase and the stability of the two-phase microstructure at various aging temperatures were evaluated using TEM techniques. The results indicate that the β phase in equilibrium with the σ phase at high temperatures decomposes to the orthorhombic phase at temperatures below 1200°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 393
Copyright
Copyright © Materials Research Society 1990

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References

1. Castillo, J., Hoelzer, D.T., Kim, Y.S., and Ebrahimi, F., To be published in “High Temperature Aluminides and Intermetallics”, ASM/TMS-AIME Fall Meeting in Indianapolis, Ind., 1989.Google Scholar
2. Bendersky, L.A. and Boettinger, W.J., in High Temperature Ordered Intermetallic Alloys, edited, edited by Koch, C.C., Liu, C.T., Stoloff, N.S., and Taub, A.I., Mater. Res. Soc. Proc. 133, (1989), p. 45.Google Scholar
3. Jewett, T.J., Lin, J.C., Hsieh, K.C., Bonda, N.R., Chang, Y.A., and Perepezko, J.H., in High Temperature Intermetallic Alloys, edited by Koch, C.C., Liu, C.T., Stoloff, N.S., and Taub, A.I., Mater. Res. Soc. Proc. 133, (1989), p. 69.Google Scholar
4. Perepezko, J.H., Chang, Y.A., Seitzman, L.E., Lin, J.C., Bonda, N.R., Jewitt, T.J., and Mishurda, J.C., To be published in “High Temperature Aluminides and Intermetallics”, ASM/TMS-AIME Fall Meeting in Indianapolis, Ind., 1989.Google Scholar
5. Kaltenbach, K., Gama, S., Pinatti, D.G., Schulze, K., and Heng, E., Metallkde, Z., 80, (1989), p. 535.Google Scholar
6. Hoelzer, D.T. and Ebrahimi, F., To be published in “High Temperature Niobium Alloys”, ASM/TMS-AIME Fall Meeting in Indianapolis, Ind., 1989.Google Scholar
7. Banerjee, D., Gogia, A.K., Nandi, T.K., and Joshi, V.A., Acta Met., 36, (1988), p. 871.Google Scholar
8. Kaufman, M.J., “Phase Relations in the Ti3Al + Nb System,” Report #A FWAL-TR-88-4113, Air Force Wright Aeronautical Laboratories, July 1988.Google Scholar
9. Weykamp, H.T., Masters Thesis, University of Washington, 1989.Google Scholar